Nice parts, especially the torso, I like that "iron-shallop-armor" of the black knights.
But the battering ram ain't look strong enough to destroy a heavy door! And the shield on this siegeweapon won't offer any soldier protection against arrows, stones, hot water and pitch. A battering ram needs a arrow-protecting shield with wet leather on it. It would also be clever if there was a meganism which provides the users the possibility to hit the door more than once hit each storm.
So I would give this set an 6/10

It's a pretty good set for the value, with $2 for 1 minifigure, as opposed to today's standards of about $5-$6 for 1 wanted minifigure. (i.e. the catapult, with 2 skeletons, and the crossbow attack with 1) It doesn't have a very good design for its period though.

A neat little set, I like the soldier and the set does come with some extra weapons but the battling ram is kind of a joke. The only thing the ram is good for is to hide behind. I give this set a 6/10.